Improvement in nail-machines



M. T. ROUN DS.

Nail Machine.

Patented Oct. 11. 1864.

UNITED STATES PATENT OFFICE.

MARCUS T. ROUNDS, OF TAUNTON, MASSACHUSETTS.

IMPROVEMENT IN NAIL-MACHINES.

Specification forming part of Letters Patent No. 44,66l, dated October 11, 1864.

To all whom it may concern:

Be it known that I, MARCUS T. RoUNDs, of Taunton, in the county of Bristol and State of Massachusetts, have invented a new and Improved Machine for Making Out Nails; and I hereby declare that the following is a full, clear, and exact description thereof, reference being bad to the accompanying drawings, making a part of this specification, in which- Figure 1 is a perspective view of a cut nail machine with my improvements attached thereto. Fig. 2 is a transverse vertical section through the same, the plane of intersection passing through the center of the heading-die, and representing the position of the various parts when the heading-die comes up to head the blank. Fig. 3 shows the method of holding the blank by the head between the movable back piece and nipper until the movable die comes forward to grasp and form the shank of the nail. Fig. 4 is an elevation of the stationary back piece, die, and cutter the part which is to form the shank.

To enable others skilled in the art to understand and use my invention, 1 will now proceed to describe the manner in which I have carried it out.

In the said drawings, A is the frame-work, from which arise the standards B in suitable bearings, in which runs the driving-shaft C, carrying at one extremity the fly-wheel and at its other extremity the crank-wheel E. A rod or pitman, F, is pivoted at its upper end to the crank-wheel E, and at its lower end to an arm, G, which is secured to and rocks the jaw H, pivoted at a to the frame-work A. Within this movable jaw is fitted the cutter b, which is thrown down on the nail-plate as it is fed under it. A spring-gage, c, is placed and projects down beyond its edge, for the purpose of gaging the width of the blank and guiding it down on the descentof the cutter 1). To the outside of the stock holding the cutter I) is secured the arm d, the use of which will be described hereinafter.

A shaft, I, supported at its ends in the standards B, serves as a fulcrum for the two levers of, their upper ends bearing against the cams J K on the shaft 0, while their lower ends have proceeding from them horizontally the rods g h. The farther end of the rod h is secured to the nipper L, and throws it forward against the resistance of a spring, M, which is connected to the nipper L by means of the rod '0'. The forward end of this nipper Lis provided with a projection, j, which serves as a support for the head of the blank to rest on when the nipper is relieved by the ascent of the arm 01. The rear end of the nipper L rests within a slot in the lower end of a post, N, proceeding up from and pivoted to the frame-work A, and the length of the nipper is adjusted therein by means of the wedge Ir. The nipper is borne down by the pressure of the arm cl (before mentioned) against the resistance of a spring, I, one end of which is secured to the top of the post N, while the other end is fastened to the frame-work. The stop at prevents the nipper from being thrown up too far on the ascent of the arm d.

O is a bent lever, its upper end resting on the cam n of the drivingshaft G, and is kept down upon the cam by the spring 0 against any tendency which it may have to be thrown up:

The lower end of this lever is enlarged, so as to form the jaw P, andis pivoted to the frame Work at p. This jaw is provided with a die q, which, together with a stationary die, 1" placed opposite, gives the required form to the shankof the nail. Another jaw, Q, bearing the headingdie o, is pivoted to the frame-work at s, and is vibrated by the rocking of the cutter-jaw H, the upper end of a post, R, fitting into a socket under the bent arm S of the jaw Q, while its lower end rests in a socket in the end of the arm G, which thus communicates motion to the jaw bearing the headingdie.

A stationary cutter, T, fits snugly in a recess of the stock U, and rests upon a back piece V, in which the stationary die r is cut, the length of this being the same as the length of the in a recess in the rear of the movable cutter b, shank of the nail to be made.

Operation: The plate from which the nailblank is to be cut is rolled down to the required form, and is fed into the machine over the upper surface of the stationary or bed cutter T, the spring-gage c on the heading side of the dies regulating the width of blank required. The blank is cut off, and carried down by the descent of the movable cutter b, and is pressed by the spring-gage 0 against the face of the stationary cutter T, and down against the side of the movable back piece t, until the blank is pressed under the notch therein, when the nipper L is carried up under it, and holds it firmly by the head until the gripping-die (1 comes up to seize and shape the shank, (the movable cutter I) having first passed out of its path to admit of this movement.)

As soon as the blank is seized by the grippin g-dies r q, the movable back piece t and nipper L release their hold on the head of the blank and return to their normal position, thus allowing the heading die '0 to comeforward and upset the end of the blank, so as to form thehead of the nail, when the movable die q and heading-die v are withdrawn from the nail, and it passes out of the machine into atrough provided for this purpose. The plate continues to be fed in as before, and another blank is cut and a nail formed by the successive operations of the machine.

By having the gage c and movable back piece If next to the head of the nail, I am enabled to make the grippingdies of sufficient length to grasp the shank of the nail throughout the whole or any portion of its length, thus producing a smooth and finished nail of the required form.

In the machine above described the nipper L is carried down under the blank, and its motion is made independently of the blank itself, and it may be placed in anyother suitable position, if desired.

Instead of the nipper being carried down by the arm d under the blank, it may be simply moved back and forth, and press the blank against the edge of the movable back piece.

It will be seen that this machine is particularly applicable to making tacks, as by the arrangement of the parts above described the tacks can be held on the heading side of the dies, instead of at the point, by which means the shank can be gripped by the dies through out its whole length, and a perfectly finished tack produced.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The movable back piece ton the heading side of the dies, operated by means of a cam or other suitable device, substantially in the manner and for the purpose set forth.

2. Extending the nipper L beyond the heading side of the dies to grasp the head of the blank between said nipper and the movable back piece it, substantially as set forth.

3. The nipper L, working on the heading side of the dies, in combination with the movable back piece t, and the gage 0, arranged and operatin g substantiall y in the manner and for the purpose described.

MARCUS T. ROUNDS.

\Vitnesses:

Geo. BALDWIN, UHEs. R. FIEL 

